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| 1997 to 2003 F-150 4.2L, 4.6L, and 5.4L equipped F-150s. |
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#1
Tue, March 16th, 2010, 04:09 AM
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Might be cheaper to take it to a dealer, or someone who has an IDS to do a Relative Compression Test. They can preform this test without even opening the hood, and it is very accurate.
 I am with 88 on this, if the vehicle has been well maintained I would not be the least bit worried about adding custom tunes. Just a thought. 
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#2
Tue, March 16th, 2010, 07:49 AM
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Im afraid to have a compression check done
 but seriously you would never know it had the high miles driving it. It was extremely well taken care of. i dont plan on beating up on it just want it to be a little more responsive and shift a tad firmer like my previous 06 did
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#3
Tue, March 16th, 2010, 09:16 AM
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I wouldn't worry about it.
If you want the improved custom tune response and shifts then get them.
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